Product Description:

The RD52.1-4B-090-D-F1-FW is a drive controller manufactured by Bosch Rexroth Indramat within the RD 500 Drive Controllers series. It links a three-phase power supply to AC motors and supports torque- and speed-regulated operation in conveyor lines, presses, and material-handling stations. By combining power conversion and vector control inside one housing, the unit helps reduce cabinet complexity in industrial automation cells. This arrangement also allows the drive to respond quickly to changing load conditions without separate external power sections.

The controller delivers 90 kW of continuous output and accepts line inputs in the 380–480 V range. Motion commands are processed through field-oriented vector control, which separates flux and torque components for accurate dynamic response and stable low-speed behavior. A built-in brake chopper directs regenerated energy to an external resistor during rapid deceleration, which helps protect the DC bus when driven loads overrun the motor. Heat is removed by a plug-through cooler that places the heat sink outside the control cabinet, reducing the thermal load inside the enclosure. Real-time current feedback from the U6, V6, and W6 filter points helps the control core minimize harmonics and keep the three output phases balanced.

The input stage is arranged as a three-phase AC converter, so rectification and inversion are integrated without separate external modules. An integrated mains filter reduces conducted emissions on the supply connection, which supports use in plants with sensitive electrical equipment nearby. The power section accepts supply variation within a ±10% tolerance, allowing the drive to remain operational during brief voltage changes. The unit is in design generation 1, which maintains mechanical fit and electrical compatibility with RD 52 option cards.